private void SupprimerReservation(object sender, EventArgs e)
 {
     if (sender != null)
     {
         ListeReservations.Remove(sender as ReservationViewModel);
     }
 }
        private void UpdateListReservation()
        {
            List <Reservation> AllResa = Srv.GetReservations();

            foreach (Reservation resa in AllResa)
            {
                ReservationViewModel newResa = new ReservationViewModel(Srv, resa);
                newResa.ReservationSupprimee += SupprimerReservation;
                ListeReservations.Add(newResa);
            }
        }
        private void NouvelleResa()
        {
            ReservationViewModel vm = new ReservationViewModel(Srv, new Reservation());

            //vm.EventSupprimer += Vm_EventSupprimer;
            ListeReservations.Add(vm);

            observer.MoveCurrentTo(vm);

            NotifyPropertyChanged("ListeReservations");
        }